Siemens MICROMASTER 420 Error A0504: Inverter Over-temperature

Siemens MICROMASTER 420 inverter · taken from the manufacturer’s manual, pages cited

Warning codeA0504

Inverter Over-temperature code A0504 indicates the heat-sink temperature has exceeded warning level, causing reduced output. The manual's first action is: “Check if ambient temperature is within specified limits”

Model
Siemens MICROMASTER 420
Display shows
Inverter Over-temperature (A0504)
Type
Warning code
Source
Manual p. 72

What A0504 means

Inverter Over-temperature p. 72

Common causes

  • Warning level of inverter heat-sink temperature (F0614) is exceeded, resulting in pulse frequency reduction and/or output frequency reduction (depending on parametrization in (P0610)) p. 72

Safety warnings — read before you start

  • DANGERDANGER. indicates an immiently hazardous situation which, if not avoided, will result in death or serious injury. p. 6

What to do

  1. Check if ambient temperature is within specified limits p. 72

If A0504 is still not resolved

  • Check if ambient temperature is within specified limits p. 72
    “Check if ambient temperature is within specified limits”
Open the manual at page 72 All MICROMASTER 420 error codes Manual details & download

This page summarises what the manufacturer’s manual says about A0504; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.